Precipitation analyses using SSM/I measurements for selected ERICA cyclones
Almario, Bayani J., Jr.
Wash, Carlyle H.
Durkee, Philip A.
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A recently developed SSM/I exponential rain algorithm is evaluated using passive microwave data from ERICA OPs 2, 3, 4, and 5. Resulting SSM/I rain analyses were first compared with aircraft radar and coastal radar data. SSM/I rain analyses in IOPs 2, 3 and 4 were then used with GOES enhanced IR imagery to determine ERICA cyclones' synoptic rain structure. The SSM/I rain analysis in IOP 5 agreed well with the aircraft radar and coastal radar observations. Maximum SSM/I rain rate areas coincided with the radar intensity observation, but SSM/I rain rates were somewhat less than inferred by the radar. SSM/I rain rate analyses clearly delineate the liquid precipitation patterns within the IOP 2, 3, and 4 cyclones. The SSM/I rain rate data shows promise to significantly improve analysis of precipitation over the ocean, where conventional data is notably sparse.
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